package com.atguigu.springcloud;

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;

/**
 * http://localhost:8001/payment/hystrix/timeout/1
 * hystrix 启动类
 */
@SpringBootApplication
// 表明注册进入 eureka 客户端
@EnableEurekaClient
@EnableCircuitBreaker // 激活hystrixcommond
public class PaymentHystrixMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentHystrixMain8001.class,args);
    }

    /**
     * 这个配置不配 dashboard无法监控本微服务
     * 此服务是为了服务监控者而配置。与服务容错本身无关，Springcloud升级后的坑
     * ServletRegistrationBean因为SpringCloud的默认路径不是“hystrix.stream”，
     * 只要在自己的项目里面配置上下面的servlet即可
     * @return
     */
    @Bean
    public ServletRegistrationBean getServlet() {

        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
        // 系统启动时加载顺序
        registrationBean.setLoadOnStartup(1);
        // 路径
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}
